third_party/WebKit/Source/core/css/CSSMatrix.cpp

/*
 * Copyright (C) 2008 Apple Inc. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "core/css/CSSMatrix.h"

#include "bindings/core/v8/ExceptionState.h"
#include "core/CSSPropertyNames.h"
#include "core/CSSValueKeywords.h"
#include "core/css/CSSIdentifierValue.h"
#include "core/css/CSSToLengthConversionData.h"
#include "core/css/StylePropertySet.h"
#include "core/css/parser/CSSParser.h"
#include "core/css/resolver/TransformBuilder.h"
#include "core/dom/ExceptionCode.h"
#include "core/frame/UseCounter.h"
#include "core/layout/api/LayoutViewItem.h"
#include "core/style/ComputedStyle.h"
#include "core/style/StyleInheritedData.h"
#include "wtf/MathExtras.h"

namespace blink {

CSSMatrix* CSSMatrix::create(ExecutionContext* executionContext,
                             const String& s,
                             ExceptionState& exceptionState) {
  UseCounter::count(executionContext, UseCounter::WebKitCSSMatrix);
  return new CSSMatrix(s, exceptionState);
}

CSSMatrix::CSSMatrix(const TransformationMatrix& m)
    : m_matrix(TransformationMatrix::create(m)) {}

CSSMatrix::CSSMatrix(const String& s, ExceptionState& exceptionState)
    : m_matrix(TransformationMatrix::create()) {
  setMatrixValue(s, exceptionState);
}

static inline PassRefPtr<ComputedStyle> createInitialStyle() {
  RefPtr<ComputedStyle> initialStyle = ComputedStyle::create();
  initialStyle->font().update(nullptr);
  return initialStyle;
}

void CSSMatrix::setMatrixValue(const String& string,
                               ExceptionState& exceptionState) {
  if (string.isEmpty())
    return;

  if (const CSSValue* value =
          CSSParser::parseSingleValue(CSSPropertyTransform, string)) {
    // Check for a "none" transform. In these cases we can use the default
    // identity matrix.
    if (value->isIdentifierValue() &&
        (toCSSIdentifierValue(value))->getValueID() == CSSValueNone)
      return;

    DEFINE_STATIC_REF(ComputedStyle, initialStyle, createInitialStyle());
    TransformOperations operations;
    TransformBuilder::createTransformOperations(
        *value, CSSToLengthConversionData(initialStyle, initialStyle,
                                          LayoutViewItem(nullptr), 1.0f),
        operations);

    // Convert transform operations to a TransformationMatrix. This can fail
    // if a param has a percentage ('%')
    if (operations.dependsOnBoxSize())
      exceptionState.throwDOMException(SyntaxError,
                                       "The transformation depends on the box "
                                       "size, which is not supported.");
    m_matrix = TransformationMatrix::create();
    operations.apply(FloatSize(0, 0), *m_matrix);
  } else {  // There is something there but parsing failed.
    exceptionState.throwDOMException(SyntaxError,
                                     "Failed to parse '" + string + "'.");
  }
}

// Perform a concatenation of the matrices (this * secondMatrix)
CSSMatrix* CSSMatrix::multiply(CSSMatrix* secondMatrix) const {
  if (!secondMatrix)
    return nullptr;

  return CSSMatrix::create(
      TransformationMatrix(*m_matrix).multiply(*secondMatrix->m_matrix));
}

CSSMatrix* CSSMatrix::inverse(ExceptionState& exceptionState) const {
  if (!m_matrix->isInvertible()) {
    exceptionState.throwDOMException(NotSupportedError,
                                     "The matrix is not invertable.");
    return nullptr;
  }

  return CSSMatrix::create(m_matrix->inverse());
}

CSSMatrix* CSSMatrix::translate(double x, double y, double z) const {
  if (std::isnan(x))
    x = 0;
  if (std::isnan(y))
    y = 0;
  if (std::isnan(z))
    z = 0;
  return CSSMatrix::create(
      TransformationMatrix(*m_matrix).translate3d(x, y, z));
}

CSSMatrix* CSSMatrix::scale(double scaleX, double scaleY, double scaleZ) const {
  if (std::isnan(scaleX))
    scaleX = 1;
  if (std::isnan(scaleY))
    scaleY = scaleX;
  if (std::isnan(scaleZ))
    scaleZ = 1;
  return CSSMatrix::create(
      TransformationMatrix(*m_matrix).scale3d(scaleX, scaleY, scaleZ));
}

CSSMatrix* CSSMatrix::rotate(double rotX, double rotY, double rotZ) const {
  if (std::isnan(rotX))
    rotX = 0;

  if (std::isnan(rotY) && std::isnan(rotZ)) {
    rotZ = rotX;
    rotX = 0;
    rotY = 0;
  }

  if (std::isnan(rotY))
    rotY = 0;
  if (std::isnan(rotZ))
    rotZ = 0;
  return CSSMatrix::create(
      TransformationMatrix(*m_matrix).rotate3d(rotX, rotY, rotZ));
}

CSSMatrix* CSSMatrix::rotateAxisAngle(double x,
                                      double y,
                                      double z,
                                      double angle) const {
  if (std::isnan(x))
    x = 0;
  if (std::isnan(y))
    y = 0;
  if (std::isnan(z))
    z = 0;
  if (std::isnan(angle))
    angle = 0;
  if (!x && !y && !z)
    z = 1;
  return CSSMatrix::create(
      TransformationMatrix(*m_matrix).rotate3d(x, y, z, angle));
}

CSSMatrix* CSSMatrix::skewX(double angle) const {
  if (std::isnan(angle))
    angle = 0;
  return CSSMatrix::create(TransformationMatrix(*m_matrix).skewX(angle));
}

CSSMatrix* CSSMatrix::skewY(double angle) const {
  if (std::isnan(angle))
    angle = 0;
  return CSSMatrix::create(TransformationMatrix(*m_matrix).skewY(angle));
}

String CSSMatrix::toString() const {
  // FIXME - Need to ensure valid CSS floating point values
  // (https://bugs.webkit.org/show_bug.cgi?id=20674)
  if (m_matrix->isAffine())
    return String::format("matrix(%f, %f, %f, %f, %f, %f)", m_matrix->a(),
                          m_matrix->b(), m_matrix->c(), m_matrix->d(),
                          m_matrix->e(), m_matrix->f());
  return String::format(
      "matrix3d(%f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, "
      "%f)",
      m_matrix->m11(), m_matrix->m12(), m_matrix->m13(), m_matrix->m14(),
      m_matrix->m21(), m_matrix->m22(), m_matrix->m23(), m_matrix->m24(),
      m_matrix->m31(), m_matrix->m32(), m_matrix->m33(), m_matrix->m34(),
      m_matrix->m41(), m_matrix->m42(), m_matrix->m43(), m_matrix->m44());
}

}  // namespace blink